@article{RCM_1972__6_181591,
     author = {Yu Takeuchi},
     title = {Densidad de los operadores de {Schatten} en un espacio de {Hilbert}},
     journal = {Revista colombiana de matematicas},
     pages = {17--56},
     publisher = {mathdoc},
     volume = {6},
     year = {1972},
     url = {http://geodesic.mathdoc.fr/item/RCM_1972__6_181591/}
}